With the engin block as the only known quantity, can you figure out what the perfect CRANK & ROD LENGTH would be?

 

define perfect.

and you must not have been too good at algebra...it's tough to solve with 2 unknowns...real tough...

 

I am not looking to flame anyone but that is what you ask for when you try to insult someone elses intelgence. If you buidl a car from the ground up, there are more than one unknown. When honda builds an engin they have millions of unknowns. If you do not know the answer, there is no need to reply. I thought this forum was for thinking out of the box and doing things that have never been done before. Latly it seems that anyone who asks a strang abnormal question gets reemed.

 

What "perfect" are you looking at? Optimal displacement, optimum performance, optimum life...etc?

 

I think optimum Rod/Stroke ratio with reliability. 1.75 is square so that would be the goal but can it be done in an H22 / H23?

 

I think you are right with the 1.75 square.. and of course satan does not know the answer. you start a completely theoretical thread that has no stated practical goal. perfect for what application?

Besides, prehaps this thread belongs in the "TECH" forum....

The one that says:

"Engine and suspension theory, modification, and tuning."

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crj_lll &raquo;</TD></TR><TR><TD CLASS="quote">I think optimum Rod/Stroke ratio with reliability. 1.75 is square so that would be the goal but can it be done in an H22 / H23?</TD></TR></TABLE>

1.75 is not 'square'. Oversquare and undersquare refers to the relationship between bore and stroke, not rod and stroke.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crj_lll &raquo;</TD></TR><TR><TD CLASS="quote">I am not looking to flame anyone but that is what you ask for when you try to insult someone elses intelgence. If you buidl a car from the ground up, there are more than one unknown. When honda builds an engin they have millions of unknowns. If you do not know the answer, there is no need to reply. I thought this forum was for thinking out of the box and doing things that have never been done before. Latly it seems that anyone who asks a strang abnormal question gets reemed. </TD></TR></TABLE>

hahha you're thinking out of the box? listen my answer was perfectly fine I was trying to point out something to you, but instead you just don't get it, and think you're insulting my intelligence? LOL

rod length: 100mm
stroke: 57.14mm
rod/stroke = 1.75

rod length 150mm
stroke: 85.7mm
rod/stroke = 1.75

there's a million answers to your question because you gave TWO UNKNOWNS

 

yea satan is right if you do not have a crankshaft stroke or a rod length than you cant figure figure anything out, there are all kinds of different combinations, if you are talking about a 90.7mm stroke it wouldn't be possible to increase the rod length without a deck plate, the best way to do this would be to decrease the stroke to something like 88 out of an f20a/b/c and use 154mm rods which would make a 1.75 r/s ratio. But I hate to break it to you this has already been thought of a million times and there is really no perfect rod length, they all have their drawbacks

 

nevermind. Had this same problem when I was talking about 5 speed vs 6 speed. Found the answer on another board. I will do the same with this.

 

if you are talking about optimum stroke with an optimum r/s to produce the largest powerband which would yeild the fastest times, then let us know because that sure will take alot of R&D

 

square is a term used for a motor having the same bore and stroke measurements... for example...

K20A = 86mm bore by 86mm stroke

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rick Solis &raquo;</TD></TR><TR><TD CLASS="quote">square is a term used for a motor having the same bore and stroke measurements... for example...

K20A = 86mm bore by 86mm stroke</TD></TR></TABLE>

learn something new everyday